Analysis on factors of relapse after orthodontic treatment and evaluation of the effect of retreatment

TAN Huan-yan

doi:10.3969/j.issn.1674-3806.2014.05.19

Abstract：Objective To analyze the main reasons of relapse after orthodontic treatment , and provide better understanding of the diagnosis for retreatment .Methods From September 2003 to October 2013 , 603 patients re-ceived fixed orthodontic treatment in Laibin People′s Hospital,and of them relapse were found in 56 patients(18 pa-tients went to retreatment ) .Six hundred and three patients were divided into relapse group ( n=56 ) and non relapse group(n=547), and the relevant clinical data were compared between two groups by univariate analysis .All clinical informations were collected in the two groups ,including age, sex,retention period, growth pattern, the occlusion at the end of former treatment , wisdom teeth eruption , abnormal oral habit , and so on.The correlation analysis was per-formed between relapse and above factors .The efficacy of retreatment was assessed .Results Between two groups , there were significant difference in first diagnosed age and treatment ( P<0.01 ) , but no statistical significance in gender ( P>0.05 ) .Analyzing the factors of relapse showed ,there were significant difference in the retention period , former treatment and wisdom teeth eruption ( P<0.05 ) , but no statistical significance in growth pattern and abnormal oral habit(P>0.05).Fifty-six patients with relapse were properly handled and obtained satisfactory clinical results . Conclusion Fixed orthodontic relapse is closely related to the correction plan , and scientific corrective plan should include sufficient retention ,rational planning and good timing of treatment in order to facilitate stable curative effect , and proper retention is the key to reducing relapse .